Improvement in sewing-machines



sc .oFlELn L SIMMONS. l Sewing'MacHine.

Patented Marchi, 1864.

' Wal-112965136 lUNITED STATESl PATE-NT OFFICE.

A. G. SIMMONS AND CHAS. lS-COFIELD, OF UTICA, NEW YORK.

IMPROVEMENT IN SEVVZING-MACHINES.

Specification forming part ci' Letters Patent No. 41.790,l` daied Marchi, 135i To ail whom 'it 'may concern:

` Be it known that we, ADoLPHUs G. SIMMONS and CHARLES SGOFIELD, of Utica, in the coun ty ot' Oneida and Sta-te of New York, have inv vented certain new anduseful Improvements` in Sewing-Machines; and we do hereby declare that thefollowingisalfull, clear, and exact description ot the same, reference being had to the accompanying drawings, forming part of' .thisspecilicatioih in wli'ichi Fignre lis a front view of part of the station'ary arm, the needle-movement, feed mechanism, and Itake-up of a sewing-machine illustrating ourjinvention. Fig. 2 is avertical section in the plane indicated bythe linea,l in Fig.

l. Fig. 3 is a sideview of the face-plate and A take np. Figf-Llgis a side-view of the needleoperating mechanism. Fig, 5 is ahorizontalsection of the needle-operating mechanism.

Fig. 6-is.a` side view of the needle-.bar and of the oscillating sheath in which it slides.

Similar letters ot' reference' indicate correspending partsin theseveral figures.'

The rst part ot' our invention-.relates to the employment; for operating the needle oi' a rocker which 'produces what is called the loop motion7 to commence tlie'forrnation'of vthe loop, and to obtain time for the passage oi' the shuttle or looper into or through itby the point@ ot' connection of the needlebar passing a l'ittle beyond a position directly below the axis ot' oscillation ofthe rocker; and itconsists vin a certain arrangement oi' the said rocker and of its connections'with the needle and with 'a crank or its equivalent ,on the main shaft or other'rotating shaft ofthe machine, wherebyy the central stud or bearing ofthe rocker is relieved of strain at the time o'f the entrance ofthe needle into the cloth.. l

. The second partof cnr invention relates to the employment ofthe needle to'prodnce the feed movement ofthe cloth; and it consists in'.

a certain mode of applying and operating the needle-bar, whereby the needle is caused to produce .the feed in a more effective manner than in the needle-feeds heretofore employed.l

The third part o t' our invention relates lto the takenp or apparatus for controlling the slack of the vneedle-thread; and it consists in a certain mode of applying and operating such take-up, whereby it is rendered entirely independent of all parts of the needle-operating mechanism.

To enable others skilled inthe art to make and use our invention,i we will proceed to de- .scribe its consti'nctioii'-and operation.

A fis a portion o't the bed'plato of the sewngmachine.

B is a part of thejstationary arm, which is hollow, and contains'the bearings for the niain shaft O,which has secured upon it, at the end next thei'ace-plate l) and needle-bar E, a wristplate, F,- andthe caihs G5 and ll, the said plate Vcarrying the'cra'nk-wrist a, for operating the needle-rocker I, the cam G producing the movement ofthe takenp andthe cam Hprodncing the feed-movement.

' 'J is a rod which connects the rocker with the crank;v rrist a, andK is a rod which connects the needle-bar-wi'th the rocker.

The needle-rocker lis substantia'll'ylike that which forms part ofthe subject-matter of Letters Patent granted to S. S. Burnet and W.

Broderick, dated November 30, 1858, butth'e arrangement ot' its connections is very dilferent. 1n Burnet and Brodericks arrangement the crankshaft is nearly on the saine level with but distant horizontally from the stad or its equivalent,- on which the. rocker works, and the rod which connects the rocker with the crank works nearly at right angles to the rodv which connects it with the needle, and thelatter rod and the rocker operate like a toggle, and the whole ofthe force that is employed to produce the penetration of the needle is made to act upon the stad on `which the rocker oscillates; but `in our arrangement the stud b,

upon which the rocker oscillates, is arranged directly over and some .distance above the crank-shaft O, and the rod vJ, which connects the rocker with the crank-wrist, is attached to the rocker at a higher point thanthe rod K,

which connects the rocker with the needle-bar E, as shown in Figs. 2 and 3,and in red ont line in Fig, 4,-andthe consequence is that lwhen the crank-wrist, in its revolution, has

especial advantngeiu machines for sewing in,

leather and othor heavy -goods which lare difficult of penetration. Y

To provide for the use of the needle for feed- -ot' the cam G upon 'thewarm k, and draws the thread 'double and in the form of a loop through ing the clothl or other material, the needlebar Eis tted to `'slide longitudinally within a sheath, L, which ispvoted near its upper end by apivot, c, to the face-plate D, yand which has an oscillating motion upon the said pivot in a plane parallel with the desired direction of the feed-movement produced by the cam El with the aid of a'spring, d, which is shown in Fig. 2. 4The cam H acts uponV the arm e of a roekshaft, M, which works'in` suitable bearings in fthe arm B and face-,plate D, and the spring d drives the sheath L and thearm E of the rock'shai't M back again'as the surf-scoot the cam recedes. rlhe cam H is so formed thatv it produces the abovedescrihed movement during a small port-ion ot' the-revolution of the main shaft (Landis so set that it produces the said movementwhile the needle is atits greatest penetration, and so leaves the needle free lrcm lateral strain'l during the whole of its movement, except that part in which it is well r able to bear it--viz., while the stif,I part, nearv its head; is in the cloth. The length ot' the feed is varied by moving.,r the stud fin-the arm gf 4 nearer to or farther from the rock-shaft, which is slotted for this purpose. The studf is selnredin the requiredV position in the slot of the arm g by means of a nut., h, fitted to a screw-r thread on the said'stud. The feed, whether.V long or short, is always performed during the same portion ot' the revolution ofthe main Shaft, and consequentlyr alwaysdiy the same stili' portion of the needle.'

N is the take-u p, consisting of a long arm,

' l'rot-:king on a center, 'i, on the outer side ofthe face-,plate D, and haring an eye, j, atits exftremity, through which the thread passes on its way to the needle. This lever is tirmly selcured to a rockshai't, P, which wprksin bear.- in gs in the stationary arm -B and'ace-plate D,

specitieiL and anotherarm. k, of the .said rock-shaft, is held in contact with the cam AGr by means of a spring, l, which is coiled around the rock-shaft and secured to the stationary arm B, and as the needle rises to draw up the loop through the cloth, the said arm N4 is moved aside, as

shown in blue-outline in Fig. 3, by the action cloth in commencing the next stitch, making."

it impossible for a loose loop (if-thread to remain upon the upper surface ofthe work,las

sometimes happens with other kinds-,of take-up.

What we claifij as our invention, and desire 4to secure b`y Letters Patent, is-

- 1. Thefariangement ol' th'erocker I and its connections J' K, "ilh the crank-wristand nee (lle-bar, substantially ias' herein described, whereby at the timeof the needle entering and passing into the cloth .or other material to be sewed the said connections are broughtparalnlel, or nearly so witireach other and the stud or center bearingjof the rockerfisrelieved ot' pressure and strain, substantiallyas herein specih'ed. n 2. The arran gementof the needle-harto slide in an oscillating sl1 eath,L, 'operated by a cam, H, rock-shaft M ,arms e g, and spring 01,01' their equivalents, substantially as and for the pnrpose. herein specified.

3. The take-upN to draw the th read through the eye m, attached'to amok-shaft, P, and op-l eratedindependently of the needle-operating mechanism by means of a cam, G, and spring,r l, substantially as and for the purpose herein ADOLPHUS G. SIMMONS., GHAS. SCOFIELD. Witnesses:

WM. H. PRATT, I B. F. BROOKS.- 

